from info import redis_store, constants
from info.models import User, News, Category
from info.utils.response_code import RET
from . import index_blue
from flask import render_template, session, request, jsonify
from flask import current_app

@index_blue.route('/news_list')
def new_list():
    """
    获取首页新闻数据

    :return:
    """
    # 1.获取参数
    # 新闻分类的id
    cid = request.args.get("cid","1")
    page = request.args.get("page","1")
    per_page = request.args.get("per_page","10")

    # 2.校验参数
    try:
        page = int(page)
        cid = int(cid)
        per_page = int(per_page)
    except Exception as e:
        current_app.logger.error(e)
        return jsonify(errno=RET.PARAMERR,errmsg="参数")

    filters = [News.status == 0]
    if cid!= 1: # 查询的不是最新的数据
        # 需要添加条件
        filters.append(News.category_id == cid)

    # 3.查询数据
    try:
        paginate = News.query.filter(*filters).order_by(News.create_time.desc()).paginate(page,per_page,False)
    except Exception as e:
        current_app.logger.error(e)
        return jsonify(errno=RET.DBERR,errmsg="数据查询错误")
    # 取到当前页的数据
    news_model_list = paginate.items # 模型对象列表
    total_page= paginate.pages
    current_page = paginate.page

    # 将模型对象转换成字典
    news_dict_li = []
    for news in news_model_list:
        news_dict_li.append(news.to_basic_dict())

    data = {
        "total_page":total_page,
        "current_page":current_page,
        "news_dict_li":news_dict_li
    }

    return jsonify(errno=RET.OK,errmsg="OK",data=data)




@index_blue.route('/')
def index():
    """
    显示首页
    1.如果用户已经登录,将当前登录用户的数据传到末班中,供模板显示
    :return:
    """
    # 显示用户是否登录逻辑
    # 取到用户id
    user_id = session.get("user_id",None)
    user = None
    # 尝试查询用户模型
    if user_id:
        try:
            user = User.query.get(user_id)
        except Exception as e:
            current_app.logger.error(e)
    # 右侧的新闻排行的逻辑
    news_list = []
    try:
        news_list = News.query.order_by(News.clicks.desc()).limit(constants.CLICK_RANK_MAX_NEWS)
    except Exception as e:
        current_app.logger.error(e)
    # 定义一个空的字典列表,里面装的就是字典
    news_dict_li = []
    # 遍历对象列表,将对象的字典添加到字典列表中
    for news in news_list:
        news_dict_li.append(news.to_basic_dict())

    # 查询分类数据,通过模板渲染出来
    categories = Category.query.all()

    category_li = []
    for category in categories:
        category_li.append(category.to_dict())



    data = {
        "user" : user.to_dict() if user else None,
        "news_dict_li":news_dict_li,
        "category_li":category_li
    }

    return render_template('news/index.html', data=data)


# 在网页打开的时候,浏览器会默认去请求根路径+favicon.ico作网站标签小图标
# send_static_file是flask去查找指定静态文件所调用的方法
@index_blue.route('/favicon.ico')
def favicon():
    return current_app.send_static_file('news/favicon.ico')